shadow.c (23689e91fb22c15b84ac6c22ad9942039792f3af) shadow.c (f6e39794f4b6da7ca9b77f2f9ad11fd6f0ac83e5)
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * This file contains KASAN runtime code that manages shadow memory for
4 * generic and software tag-based KASAN modes.
5 *
6 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
7 * Author: Andrey Ryabinin <ryabinin.a.a@gmail.com>
8 *

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483 * mappings, so the KASAN_VMALLOC_VM_ALLOC flag is ignored.
484 * Software KASAN modes can't optimize zeroing memory by combining it
485 * with setting memory tags, so the KASAN_VMALLOC_INIT flag is ignored.
486 */
487
488 if (!is_vmalloc_or_module_addr(start))
489 return (void *)start;
490
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * This file contains KASAN runtime code that manages shadow memory for
4 * generic and software tag-based KASAN modes.
5 *
6 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
7 * Author: Andrey Ryabinin <ryabinin.a.a@gmail.com>
8 *

--- 474 unchanged lines hidden (view full) ---

483 * mappings, so the KASAN_VMALLOC_VM_ALLOC flag is ignored.
484 * Software KASAN modes can't optimize zeroing memory by combining it
485 * with setting memory tags, so the KASAN_VMALLOC_INIT flag is ignored.
486 */
487
488 if (!is_vmalloc_or_module_addr(start))
489 return (void *)start;
490
491 /*
492 * Don't tag executable memory with the tag-based mode.
493 * The kernel doesn't tolerate having the PC register tagged.
494 */
495 if (IS_ENABLED(CONFIG_KASAN_SW_TAGS) &&
496 !(flags & KASAN_VMALLOC_PROT_NORMAL))
497 return (void *)start;
498
491 start = set_tag(start, kasan_random_tag());
492 kasan_unpoison(start, size, false);
493 return (void *)start;
494}
495
496/*
497 * Poison the shadow for a vmalloc region. Called as part of the
498 * freeing process at the time the region is freed.

--- 55 unchanged lines hidden --- 		499 start = set_tag(start, kasan_random_tag());
500 kasan_unpoison(start, size, false);
501 return (void *)start;
502}
503
504/*
505 * Poison the shadow for a vmalloc region. Called as part of the
506 * freeing process at the time the region is freed.

--- 55 unchanged lines hidden ---